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authorPau Espin Pedrol <pespin@sysmocom.de>2020-07-02 13:21:08 +0200
committerPau Espin Pedrol <pespin@sysmocom.de>2020-07-02 13:22:48 +0200
commit969a4eebaefdeb62a80b9f6b746ba69574a14c0a (patch)
tree7aa4d042aba402f69a1c4eea2c4466ca3cbba140 /src/osmo_gsm_tester
parent2ebcff934da6c7e481ad8eeda99ca626e721e725 (diff)
Introduce stress tool object
This object allows to run the "stress" cmdline program in the background on the specifies run_node, to simulate system load. To run stress, a test can simply do: stress = tenv.stress(epc.run_node()) stress.start(cpu_workers=2, mem_workers=1, io_workers=1) And the test environment will remember to stop it when the test finishes. Change-Id: I21023e6c64c48109f294291bfe3d8d8f4e1de038
Diffstat (limited to 'src/osmo_gsm_tester')
-rw-r--r--src/osmo_gsm_tester/obj/stress.py73
-rw-r--r--src/osmo_gsm_tester/testenv.py5
2 files changed, 78 insertions, 0 deletions
diff --git a/src/osmo_gsm_tester/obj/stress.py b/src/osmo_gsm_tester/obj/stress.py
new file mode 100644
index 0000000..f0e417a
--- /dev/null
+++ b/src/osmo_gsm_tester/obj/stress.py
@@ -0,0 +1,73 @@
+# osmo_gsm_tester: specifics for running stress(-ng), a tool to load and stress a computer system
+#
+# Copyright (C) 2020 by sysmocom - s.f.m.c. GmbH
+#
+# Author: Pau Espin Pedrol <pespin@sysmocom.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+from ..core import log
+from ..core import util
+from ..core import process
+from ..core import remote
+
+class StressTool(log.Origin):
+
+ STRESS_BIN = 'stress'
+
+##############
+# PROTECTED
+##############
+ def __init__(self, testenv, run_node):
+ super().__init__(log.C_RUN, StressTool.STRESS_BIN)
+ self.testenv = testenv
+ self._run_node = run_node
+ self.proc = None
+ self.rem_host = None
+
+ def runs_locally(self):
+ locally = not self._run_node or self._run_node.is_local()
+ return locally
+
+###################
+# PUBLIC (test API included)
+###################
+ def start(self, cpu_workers=0, mem_workers=0, io_workers=0, timeout=0):
+ self.run_dir = util.Dir(self.testenv.test().get_run_dir().new_dir(self.name()))
+
+ popen_args = (StressTool.STRESS_BIN,)
+ if cpu_workers > 0:
+ popen_args += ('-c', str(cpu_workers))
+ if mem_workers > 0:
+ popen_args += ('-m', str(mem_workers))
+ if io_workers > 0:
+ popen_args += ('-i', str(io_workers))
+ if timeout > 0:
+ popen_args += ('-t', str(timeout))
+
+ if self.runs_locally():
+ self.proc = process.Process(self.name(), self.run_dir, popen_args, env={})
+ else:
+ self.rem_host = remote.RemoteHost(self.run_dir, self._run_node.ssh_user(), self._run_node.ssh_addr())
+ self.proc = self.rem_host.RemoteProcess(self.name(), popen_args, env={})
+ # Warning: Be aware that if process ends before test is finished due to
+ # "-t timeout" param being set, the test will most probably fail as
+ # detected 'early exit' by the testenv.
+ self.testenv.remember_to_stop(self.proc)
+ self.proc.launch()
+
+ def stop(self):
+ self.testenv.stop_process(self.proc)
+
+# vim: expandtab tabstop=4 shiftwidth=4
diff --git a/src/osmo_gsm_tester/testenv.py b/src/osmo_gsm_tester/testenv.py
index ea71df9..1790059 100644
--- a/src/osmo_gsm_tester/testenv.py
+++ b/src/osmo_gsm_tester/testenv.py
@@ -318,6 +318,11 @@ class TestEnv(log_module.Origin):
iperf3srv_obj = IPerf3Server(self, ip_address)
return iperf3srv_obj
+ def stress(self, run_node=None):
+ from .obj.stress import StressTool
+ stress_obj = StressTool(self, run_node)
+ return stress_obj
+
def msisdn(self):
msisdn = self.suite_run.resource_pool().next_msisdn(self)
self.log('using MSISDN', msisdn)